Email client Opening only with the message {"result":"success","message":""}Issue Open any record which has the email client enabled as the documentation page Enable the email client for a table suggestsClick on the triple dot icon and click on the email client.You will see the screen instead of the expected email client form ReleaseAllCauseCustom business rule to set type sent in email logs which changes the sys_email record type to sent: ResolutionIt is not recommended to change the type of email by business rule. You might disable the BR as it will guarantee the issue will not occur any longer. Just in case you necessarily want to apply any business rule to the sys_email table, you can restrict it executes over email client messages with any condition based on the email client headers or error string. Here is just an example: For more information about business rules, visit our documentation page How business rules work